Quantitative assessment of direct and indirect impacts of introduced New Zealand screwshells (Maoricolpus roseus) on native soft sediment assemblages

We used an in situ manipulative experiment to assess the impacts of the introduced New Zealand screwshell, Maoricolpus roseus, on native soft-sediment community structure and habitat characteristics in SE Tasmania. Impacts were assessed for high and low screwshell density and for the effect of live and dead screwshells, as well as those containing hermit crabs.

本研究通过原位操控实验，评估引入物种新西兰旋螺（Maoricolpus roseus）对塔斯马尼亚东南部本地软底质群落结构与栖息地特征的影响。实验设置了高、低两种旋螺密度梯度，并分别考察活旋螺、死旋螺以及寄居有寄居蟹的旋螺的作用效应。